1// Copyright 2012 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
10//       disclaimer in the documentation and/or other materials provided
11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28// Flags: --allow-natives-syntax
29
30// Test that boilerplate objects for array literals with non-constant
31// elements (which will contain the hole at non-constant positions) will
32// not cause prototype chain lookups when generating optimized code.
33
34function f(x) {
35  return [x][0];
36}
37
38// Test data element on prototype.
39Object.prototype[0] = 23;
40assertSame(1, f(1));
41assertSame(2, f(2));
42%OptimizeFunctionOnNextCall(f);
43assertSame(3, f(3));
44%DeoptimizeFunction(f);
45
46// Test accessor element on prototype.
47Object.prototype.__defineGetter__(0, function() { throw Error(); });
48assertSame(4, f(4));
49assertSame(5, f(5));
50%OptimizeFunctionOnNextCall(f);
51assertSame(6, f(6));
52%DeoptimizeFunction(f);
53
54// Test the same on boilerplate objects for object literals that contain
55// both non-constant properties and non-constant elements.
56
57function g(x, y) {
58  var o = { foo:x, 0:y };
59  return o.foo + o[0];
60}
61
62// Test data property and element on prototype.
63Object.prototype[0] = 23;
64Object.prototype.foo = 42;
65assertSame(3, g(1, 2));
66assertSame(5, g(2, 3));
67%OptimizeFunctionOnNextCall(g);
68assertSame(7, g(3, 4));
69%DeoptimizeFunction(g);
70
71// Test accessor property and element on prototype.
72Object.prototype.__defineGetter__(0, function() { throw Error(); });
73Object.prototype.__defineGetter__('foo', function() { throw Error(); });
74assertSame(3, g(1, 2));
75assertSame(5, g(2, 3));
76%OptimizeFunctionOnNextCall(g);
77assertSame(7, g(3, 4));
78%DeoptimizeFunction(g);
79